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likoan [24]
4 years ago
7

HALP ME PLEASE 2. What two substances make the backbone of the DNA molecule? I will mark brainliest to first correct answer with

in 20 minutes, since my quiz is timed.
Biology
1 answer:
Viefleur [7K]4 years ago
8 0
Deoxyribose is the substances along with sugar and phosphates . The rungs of the ladder are made up of 5 nitrogenous bases adenine, thymine, cytosine, and guanine. 
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What two things can help reduce the effects of droughts<br>Reset<br>Next​
tiny-mole [99]

Answer:

constructing dams and building desalination plants help reduce the effects of droughts

Explanation:

3 0
3 years ago
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A haploid Moss spore with sprout grow into the young ___, the dominant generation we recognize that carries most of the plants p
MrRa [10]

Answer:

Gametophyte

Explanation:

This is is the dominant phase of moses (division bryophyte) and other lower plants such as pteridophytes and liverworts. The gametophytes produce haploid spores. When two diploid spores fuse into a zygote, it grows into a sporophyte, usually attached to a gametophyte, because it depends on it for water and nutrient. The sporophyte then produces haploid spores that give rise to gametophytes. The diploid phase is significant because it gives opportunity for recombination of genes which provides genetic variation among the moss.

6 0
3 years ago
Please help me asap i will mark brainiest!!!
marin [14]

The description of meiosis using the keywords listed in this question is given below.

<h3>WHAT IS MEIOSIS:</h3>

Meiosis is the process whereby haploid gametes (sperm and egg) are produced from diploid cells in s3xual reproduction of living organisms.

Meiosis results in genetically different daughter cells because of crossing over, which is the exchange of genetic material between two non-sister chromatids of homologous chromosomes.

Meiosis results in four daughter cells that have undergone genetic recombination.

Learn more about meiosis at: brainly.com/question/7002092

5 0
2 years ago
Which lymphatic tissue destroys and removes old red blood cells?
pishuonlain [190]

Answer: Spleen

Explanation: The spleen is an organ in the abdomen, under the ribs on the left side of the body. It stores lymphocytes, filters the blood and destroys old blood cells. As blood passes through the spleen, lymphocytes attack any bacteria or virus or other types of harmful substances that can cause infection or illness.

8 0
3 years ago
(04.01 LC)
vlabodo [156]

Answer:

Cells

Explanation:

Cells are the smallest living unit, but atoms are the smallest unit of the above choices... Cells are made of atoms... But you asked about the Smallest unit of life so I don't know if you are asking about the smallest unit ever or the smallest unit in the living things

7 0
3 years ago
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